13537-33-2Relevant articles and documents
Doppler-limited dye laser excitation spectroscopy of the >A (000)->A'(000) band of HSiF
Suzuki, Tetsuo,Hakuta, Kohzo,Saito, Shuji,Hirota, Eizi
, p. 3580 - 3583 (1985)
The >A (000)->A'(000) band of HSiF was observed by Doppler-limited dye laser excitation spectroscopy.The HSiF molecule was produced by the reaction of SiH3F with microwave discharge products of CF4.The observed spectrum was found to be almost free of perturbations and was readily assigned to about 1300 transitions of Ka' - Ka = 5-6, 4-5, 3-4, 2-3, 1-2, 0-1,1-0, 2-1, 3-2, 4-3, 5-4, 0-0,1-1, and 2-0.A least-squares analysis of the observed spectrum yielded the rotational constants and the centrifugal distortion constants for both the and states.The molecular structure was discussed using the observed rotational constants.
Rotational state-specific dynamics of SiF C2Δ-B2Σ+ collision-induced transfer
Jackson, Neil A.,Randall, Colin J.,McKendrick, Kenneth G.
, p. 51 - 59 (2007/10/03)
Laser excitation on the C2Δ-X2Π transition was used to prepare discrete rotational levels of the SiF C2Δ, υ = 0 state, allowing their state-specific collisional behavior to be investigated. Time- and wavelength-resolved returning C-X fluorescence spectra established that the initial populations were only partially perturbed by rotationally inelastic processes within the C2Δ state at the typical pressures of our experiments. Transfer within the F1 manifold appears to be favored by a factor of ～2 over transfer from F1 to F2. There is relatively little dependence on rotational state (in the range j = 2.5-21.5) of the rate constant for total collisional removal of the C2Δ state by either H2 or N2. As previously established, a fraction of the collisionally removed population is deposited in the lower-lying B2Σ+ state. Dispersed B-X fluorescence spectra revealed broad rotational distributions in the predominant B2Σ+, υ′ = 0 product level in collisions with H2 and N2, indicating substantial release of rotational energy during the transfer between electronic states. There is a positive correlation between the peak and average product j′ and the initial rotational state j. The main features of the observed behavior are reproduced by a limiting impulsive model. We believe this to be a consequence of the respective valence and Rydberg characters of the C2Δ and B2Σ+ states.
Large rotational energy release in collision-induced SIF C(2)Δ-B(2)Σ(+) valence-Rydberg transfer
Jackson, Neil A.,Watson, Cameron W.,McKendrick, Kenneth G.
, p. 564 - 570 (2008/10/08)
Distinct rotational population distributions were prepared in SiF C(2)Δ, v=0 radicals by laser excitation. Collisions with H2 or N2 transferred a fraction of the C(2)Δ molecules to the lower-lying B(2)Σ(+) state. B-X fluorescence spectra revealed the nasc
